In 1946, Frankland began full-time work in the allergy department of
St. Mary's Hospital, London.
Self-experimentation Frankland was also a supporter of the idea of
desensitisation, a technique that aims to reduce the level of immune response to
allergens by repeated low doses of the substance to which the patient has an allergy. In 1955, Frankland experimented on himself by being bitten each day by the blood-sucking insect
Rhodnius prolixus. He was assisted in this work by the
London School of Hygiene & Tropical Medicine, which was able to supply insects that Frankland could be sure he had never previously been exposed to. The bites eventually provoked a severe
anaphylactic reaction. This research contributed to an understanding of how long injections of allergens would need to be given to achieve desensitisation. Results varied by individual, but immunity to pollen was found on average after three years. Immunity to
venom-based allergens took longer and was found on average after five years. Frankland and Fleming were also concerned with
antimicrobial resistance to penicillin, with Frankland crediting Fleming with saying that careless prescription would inadvertently lead to "the death of man". In 1954, Frankland published "
Prophylaxis of summer
Hay-fever and Asthma." The article reported the results of a trial involving 200 patients with previous histories of grass pollen sensitivity half treated with active vaccines, and half with inactive 'control' vaccines. The results suggested that the active vaccines were much more effective in reducing allergy symptoms than the controls. The study was notable for being the first in the field that used randomised, controlled methods and a standardised approach to every patient. The trial, along with his work on the pollen count, was one of the contributing factors to Frankland being awarded the
EAACI Noon Award for significant contributions to
immunotherapy.
Saddam Hussein In 1979 Frankland treated Iraq's then-president
Saddam Hussein. Contacted to visit a VIP in
Baghdad having trouble with asthma, Frankland advised Hussein this was not the case and to give up his habit of 40 cigarettes a day. Frankland said that "To my lasting regret, I told him that was his trouble and that if he carried on, in another two years he wouldn't be head of state. I heard sometime later that he had had a disagreement with his secretary of state for health, so he took him outside and shot him. Maybe I was lucky."
Retirement Frankland retired from his job at St. Mary's Hospital, aged 65, and was then offered an unpaid consultancy role in the Department of Medicine at
Guy's Hospital. He worked at Guy's on this basis for another twenty years on peanut
anaphylaxis and
paediatric allergies. After retiring from Guy's he continued to participate in academic life by attending conferences and publishing articles in journals. In June 2015, at the age of 103, he was awarded an
MBE for services to allergy research. In July he was the oldest recipient of the badge of the
Order of Mercy. Also that year he appeared in an episode of the
BBC 2 television series ''Britain's Greatest Generation
, and was the oldest ever guest on Desert Island Discs''. and most recently co-authored, "Flight Lieutenant Peach's observations on Burning Feet Syndrome in Far Eastern Prisoners of War 1942–45" in the journal
QJM in 2016 (aged 104). In March 2020, in an interview for his 108th birthday during the
COVID-19 pandemic, he recounted some memories of the
1918 Spanish Flu pandemic. Frankland died on 2 April 2020 at the age of 108 of
COVID-19. ==Professional and charitable associations==